/* === Genel Tema Renkleri === */
:root {
  --card: #ffffff;          /* Kutu arka planı */
  --text: #2c2c2c;          /* Aydınlık mod metin ve sayı rengi */
  
  /* Sayaç 3D sayılar gölge */
  --number-shadow-main: 2px 2px 0 rgba(0,0,0,0.3);
  --number-shadow-light: -1px -1px 0 rgba(255,255,255,0.15);
  --number-shadow-alt: 1px -1px 0 rgba(255,255,255,0.1);
  --number-shadow-depth: 0 4px 6px rgba(0,0,0,0.25);

  /* Hoşgeldin mesaj 3D gölge */
  --welcome-shadow-main: 2px 2px 0 rgba(0,0,0,0.3);
  --welcome-shadow-light: -1px -1px 0 rgba(255,255,255,0.15);
  --welcome-shadow-alt: 1px -1px 0 rgba(255,255,255,0.1);
  --welcome-shadow-depth: 0 4px 6px rgba(0,0,0,0.25);
}

[data-theme="dark"] {
  --card: #1b1f2a;           /* Kutu arka planı */
  --text: #d3d3d3;           /* Karanlık mod metin ve sayı rengi */

  --number-shadow-main: 2px 2px 0 rgba(255,255,255,0.2);
  --number-shadow-light: -1px -1px 0 rgba(0,0,0,0.3);
  --number-shadow-alt: 1px -1px 0 rgba(0,0,0,0.2);
  --number-shadow-depth: 0 4px 6px rgba(255,255,255,0.15);

  --welcome-shadow-main: 2px 2px 0 rgba(255,255,255,0.2);
  --welcome-shadow-light: -1px -1px 0 rgba(0,0,0,0.3);
  --welcome-shadow-alt: 1px -1px 0 rgba(0,0,0,0.2);
  --welcome-shadow-depth: 0 4px 6px rgba(255,255,255,0.15);
}

/* === Sayaç 3D Stil === */
.flip-countdown {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
  font-family: 'Roboto Mono', monospace;
  flex-wrap: wrap;
  perspective: 1000px;
}

.flip-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.flip-card {
  width: 100px;
  height: 100px;
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--card);
  box-shadow:
    0 8px 15px rgba(0,0,0,0.3),
    inset 0 4px 6px rgba(255,255,255,0.15),
    inset 0 -4px 6px rgba(0,0,0,0.15);
  transition: background 0.3s ease, color 0.3s ease;
  transform-style: preserve-3d;
}

.flip-card .top {
  font-size: 48px;
  font-weight: 900;
  color: var(--text);
  text-align: center;
  line-height: 1;
  transform: translateZ(10px);
  backface-visibility: hidden;

  text-shadow:
    var(--number-shadow-main),
    var(--number-shadow-light),
    var(--number-shadow-alt),
    var(--number-shadow-depth);
}

.flip-unit span {
  margin-top: 8px;
  font-size: 16px;
  color: var(--text);
}

/* === Hoşgeldin Mesaj Stil === */
#welcome-message {
  font-size: 36px;
  font-weight: 900;
  text-align: center;
  margin-bottom: 30px;
  color: var(--text);
  text-shadow:
    var(--welcome-shadow-main),
    var(--welcome-shadow-light),
    var(--welcome-shadow-alt),
    var(--welcome-shadow-depth);
  white-space: nowrap;
  display: inline-block;
  transform: translateX(100%);
  animation: slideIn 1.5s forwards;
}

@keyframes slideIn {
  to { transform: translateX(0); }
}

/* === Hoşgeldin Mesaj Stil === */
#welcome-text {
  font-size: 36px;
  font-weight: 900;
  text-align: center;
  margin-bottom: 30px;
  color: var(--text);
  text-shadow:
    var(--welcome-shadow-main),
    var(--welcome-shadow-light),
    var(--welcome-shadow-alt),
    var(--welcome-shadow-depth);
  opacity: 0;
  transform: translateX(100%);
  transition: transform 1.5s ease, opacity 1.5s ease;
}

#welcome-text.slide-in {
  opacity: 1;
  transform: translateX(0);
}